<ion-header>
  <ion-toolbar>
    <ion-buttons slot="start">
      <ion-back-button defaultHref="tabs/tab1" text="返回"></ion-back-button>
    </ion-buttons>
    <ion-title>a03</ion-title>
  </ion-toolbar>
</ion-header>

<ion-content padding>
  <ion-list>
    <ion-item button (click)="click1()">
      <ion-label>字符串字面量类型</ion-label>
    </ion-item>
    <ion-item button (click)="click2()">
      <ion-label>联合</ion-label>
    </ion-item>
    <ion-item button (click)="click3()">
      <ion-label>交叉</ion-label>
    </ion-item>
  </ion-list>
  <ion-card id="card" style="display: none;">
    <ion-card-header>
      <ion-card-title id="cardHeader"></ion-card-title>
    </ion-card-header>

    <ion-card-content id="cardContent">

    </ion-card-content>
  </ion-card>
</ion-content>
